EP1059865A1 - Chair back construction - Google Patents
Chair back constructionInfo
- Publication number
- EP1059865A1 EP1059865A1 EP99909588A EP99909588A EP1059865A1 EP 1059865 A1 EP1059865 A1 EP 1059865A1 EP 99909588 A EP99909588 A EP 99909588A EP 99909588 A EP99909588 A EP 99909588A EP 1059865 A1 EP1059865 A1 EP 1059865A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support
- back support
- cover
- chair
- marginal edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000010276 construction Methods 0.000 title claims description 52
- 230000013011 mating Effects 0.000 claims description 7
- 230000008901 benefit Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 210000002414 leg Anatomy 0.000 description 2
- 206010048961 Localised oedema Diseases 0.000 description 1
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- 240000000528 Ricinus communis Species 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 210000001217 buttock Anatomy 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001144 postural effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
- A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
- A47C1/023—Reclining or easy chairs having independently-adjustable supporting parts the parts being horizontally-adjustable seats ; Expandable seats or the like, e.g. seats with horizontally adjustable parts
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
Definitions
- a chair in one aspect of the present invention, includes a seat, a base operably supporting the seat for movement between different depth-adjusted positions, and a back.
- the back includes a back support adapted to support a back of a seated user and an upright extending from the base that supports the back support on the base.
- the back further includes a concave lower cover that covers at least a front lower portion of the back support and a rear lower portion of the upright to provide a one-piece back and seat appearance.
- the concave lower cover defines a concavity at a rear edge of the seat and is configured to receive the seat when the seat is moved into at least one of the depth-adjusted positions.
- a chair in another aspect of the present invention, includes a seat, a base operably supporting the seat for movement between different depth-adjusted positions, and a back positioned with respect to the seat to support a seated user.
- An upright interconnects the back to the seat, the upright having a pair of spaced apart members defining a distance therebetween sufficient to receive a rear of the seat when the seat is depth adjusted in a rearward direction.
- a concave cover covers a part of the upright, the concave cover having a first portion located on a front side of the upright and a second portion located on an opposite side of the upright.
- Fig. 5 is a vertical cross section taken along the plane V-V in Fig. 1;
- Fig. 6 is a horizontal cross section taken along the plane VI- VI in Fig. 1;
- Fig. 7 is a perspective view showing assembly of the lower/front concave cover to the rear back cover
- Figs. 11 and 12 are top and side views of the control shown in Fig. 10.
- DETAILED DESCRIPTION OF PREFERRED EMBODIMENT A chair 20 (Fig. 1) embodying the present invention includes a base 21, a seat, and a seat.
- the base 21 (Fig. 1) includes a multi-legged base frame 30 with castors on ends of the legs, and a telescopingly extendable center tube 31 that extends vertically from the base frame 30 into a control 32.
- the illustrated control 32 (Figs. 10-12) is a synchrotilt control adapted to simultaneously tilt the seat 22 and back 23 during recline, and also adapted to allow manual adjustment of both the seat depth and the seat tilt angle when the chair 20 is in the upright position.
- the illustrated control 32 provides excellent advantages in combination with the other inventive aspects discussed below by providing synchrotilt movement of a seat and back. The features and operation of control 32 providing these advantages are discussed below in sufficient detail to provide an understanding of the present invention.
- control 32 is disclosed in detail in U.S. Patent No. 5,630,647. Even though the disclosed embodiment is illustrated in combination with a particular synchrotilt control, it is to be understood that the present invention is contemplated to include other synchrotilt controls, chairs not having synchrotilt controls, and chairs having either reclineable or fixed backs.
- Control 32 (Figs. 10-12) includes a housing 33 having a hole 34 shaped to securely receive an upper end of the center tube 31.
- a back-supporting bracket 35 is pivoted to the housing 33, and includes a rearwardly facing mounting throat 36 for receiving a box-shaped end 44 (Fig. 2) of the upright 24.
- a spring (not specifically shown) is operably mounted in housing 33 (Figs. 10-12) for biasing the back- supporting bracket 35 toward an upright position.
- a synchrotilt bracket 37 is pivoted to the back-supporting bracket 35 and operably movably mounted to the housing 33 for giving the seat 22 a synchronous motion as the back 23 is reclined.
- a seat-supporting structure is mounted on synchrotilt bracket 37, including a tiltable bracket 38 (Fig.
- the rear 29 of the seat 22 exits the concavity 28, but the concave cover 27 maintains the one-piece back and seat appearance because the recess of concave cover 27 is relatively dark and because the contours of concave cover 27 are blended and radiused to de-emphasize the existence of the concavity 28.
- the rear 29 of the seat 22 also moves within the concavity 28
- the stiffening channels 52 are strategically located to selectively stiffen the back support 25, but provide it with a desired amount of flexibility in selected directions so that the back flexes with a seated user's torso as the seated user leans and twists in the chair when reclining, yet so that the seated user receives adequate postural support.
- the arched section 48 is located in perimeter flange 53 slightly above its midpoint, and an aperture 54 is formed in perimeter flange 53 to facilitate molding of the arched section.
- One of the stiffening channels is located in a center of the back support 25 and extends generally vertically to form a vertical track 55 for guiding movement of a vertically adjustable lumbar support 56 (Fig. 2).
- the vertical track 55 has uneven surfaces and ridges 57 therein, and the lumbar support 56 includes top and bottom followers 58 that frictionally engage the track 55 and that form a detent with the uneven surfaces 57 to hold the lumbar support 56 in a selected vertically adjusted position.
- the uneven surface 57A can be on a side of the track 55A or on a side of the follower 58A, and further these surfaces can be angled so that they wedge together as a seated user leans on the back 23.
- the lumbar support 56 includes a lumbar cushion 59 having a flat back surface shaped to slide over the flat areas 51, and a protruding front 60 shaped to provide adjustable optimal lumbar support.
- the protruding front 60 engages a back cushion 61 (Fig. 5) positioned on a front side of the back support 25, and changes the shape of the back cushion 61 as the lumbar support 56 is adjusted.
- the lumbar support could be positioned on a front of the back cushion and under the flexible sheet 62 of upholstery material covering the back 23.
- Another stiffening channel 63 is located on each side of back support 25 immediately inside of the perimeter flange 53.
- a vertically elongated aperture or slot 64 is formed along an outside wall of the channel 63, and has an enlarged top forming an opening 65.
- the lumbar support 56 includes laterally extending end sections 66 on each side.
- the end sections 66 are shaped to be extended through the enlarged openings 65 during assembly.
- the end sections 66 include a necked section 67 shaped to slide along the aperture 64 with the lumbar end sections 66 sliding under the side portions 53A and
- FIG. 70 for receiving snap-on fasteners or screws are formed on rear cover 26 to receive snap-on fasteners or screws installed through back support 25 to attach the rear cover 26 to the back support 25.
- Stiffening ribs 71, 72, and 74 are formed on panel 68 and marginal flange 69 to stiffen the rear cover 26.
- the ribs 72 on the rear cover 26 are configured to receive one side of an S-clip 73 (Fig 7) to retain the concave cover 27 to the rear cover 26.
- the four notched ribs 71 and 74 in rear cover 26 (Fig. 7) are configured to engage a curvilinear rib 75 on concave cover 27.
- a slot 77 (Fig. 2) is formed in each of the side portions 69A and 69B of the perimeter flange 69 of rear cover 26 at a location proximate the elongated apertures 64 in back support 25.
- the slot 77 forms side tracks in the back 23 that extend along a portion of the perimeter of the back 23.
- the perimeter of the back 23 is curvilinear, such that the side tracks extend non-parallel the vertical center track 55.
- a trim piece 78 is attached to each of the slots 77, and includes a looped body 79 that aesthetically covers the slot 77, and further includes hooked legs 79' that extend through and snap lock into the slot 77.
- Screws 80 may be extended through screw holes 81 in each end of the trim pieces 78 into the perimeter flange 69 where it is desirable to more positively secure the trim pieces 78 to the perimeter flange 69.
- a handle 82 (Fig. 6) includes an inboard section 83 that telescopingly engages the end section 66 of the lumbar support 56.
- the handle 82 further includes a finger grip 84 that extends outwardly that a user can grasp for adjusting the lumbar support 56.
- the guide 85 includes inboard protrusions 86 and an outboard protrusion or wall 87 that engage opposing sides of the body 79 in the slot 77. Accordingly, when a user wants to vertically adjust the lumbar support 56, the user grasps one or both of the handles 82 and moves them upwardly or downwardly along the perimeter flange 69. As the handle 82 moves, it telescopes into or out of the end section 66 of the lumbar support 56 as the lumbar support 56 concurrently moves vertically in a path non-parallel the handle 56. The vertical spacing of the top and bottom followers 58 cause the lumbar support 56 to move without binding or cocking, even if only one handle 82 is grasped and biased by the user.
- the concave cover 27 (Fig. 8) has a concavely-shaped body panel 89 having an upper marginal flange 90 and a lower marginal edge 91 that extends generally perpendicularly to the body panel 89.
- the curvilinear rib 75 extends along lower marginal edge 91.
- a cutout 92 is formed in a center of the lower edge 91 to receive the box-shaped end section 44 of upright 24.
- Ribs 93 are formed proximate lower marginal edge 91 for engaging the S-clip 73 to retain the concave cover 27 to the rear cover 26 (Fig. 7).
- a plurality of spaced apart tabs 94 are formed along the upper marginal flange 90 for engaging slots 95 along the bottom of back support 25.
- the slots 95 are located on an outer wall of a bottom horizontal stiffening channel 96 (i. e. the lowermost one of the stiffening channels 63) and is located inboard of the perimeter flange 53C.
- a lower section of the flexible sheet of upholstery 62 wraps around the lower marginal edge of the back support 25 and includes an "up" portion 97 that extends onto a lower rear surface of the perimeter flange 53C.
- the upper marginal flange 90 of the concave cover 27 overlaps on the rear side of the perimeter flange 53C and abuttingly engages the "up" portion 97 of the sheet 62.
- the upper marginal flange 90 of the concave cover 27 clampingly, frictionally engages the "up" portion 97 of the flexible sheet 62 (Fig.
- the tabs 94 include a step 98 (Fig. 8) that, along with a tab 94', locates them at a proper depth in the slots 95, and further include an obtusely angled leading end 99 (i.e. angles at about 45 degrees to the rest of the tab 94) that facilitates assembly as the concave cover 27 is tipped and slid into position on the back support 25.
- the present chair includes a seat operably supported for depth adjustment, and a back operably supported by an upright for movement between upright and reclined positions.
- the back includes a structural back support, a rear cover covering a rear side of the back support, and a front/lower concave cover covering that part of the upright that is located between a rear of the seat and below the back support to provide a one-piece back and seat appearance.
- the concave cover defines a concavity shaped to receive a rear of the seat to facilitate depth adjustment, but so that the one-piece back and seat appearance is maintained.
- the concave cover further overlaps a lower edge of the back support to prevent see-through, and further includes tabs that engage the back support to facilitate assembly, and still further engages a rear of the back support to help hold a lower edge portion of upholstery wrapped around a lower marginal edge of the back support. Still further, a rear cover is provided that covers a rear of the back support. Also, a vertically adjustable lumbar support is provided that follows a vertical track in the back support, and laterally extending handles are provided for adjusting the lumbar support, the handles tracking along sides of the back along paths that are non-parallel the movement of the lumbar support.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US34188 | 1998-03-03 | ||
US09/034,188 US6062649A (en) | 1998-03-03 | 1998-03-03 | Chair back construction |
PCT/US1999/004016 WO1999044473A1 (en) | 1998-03-03 | 1999-02-24 | Chair back construction |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1059865A1 true EP1059865A1 (en) | 2000-12-20 |
EP1059865A4 EP1059865A4 (en) | 2002-07-31 |
Family
ID=21874854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99909588A Withdrawn EP1059865A4 (en) | 1998-03-03 | 1999-02-24 | Chair back construction |
Country Status (6)
Country | Link |
---|---|
US (2) | US6062649A (en) |
EP (1) | EP1059865A4 (en) |
JP (1) | JP2002505129A (en) |
AU (1) | AU2876099A (en) |
BR (1) | BR9908425A (en) |
WO (1) | WO1999044473A1 (en) |
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NL1014412C2 (en) * | 2000-02-17 | 2001-08-20 | Staarink Henricus Antonius M | Provision for supporting a seated person and method for designing and / or manufacturing such a facility. |
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1998
- 1998-03-03 US US09/034,188 patent/US6062649A/en not_active Expired - Lifetime
-
1999
- 1999-02-24 BR BR9908425-2A patent/BR9908425A/en not_active Application Discontinuation
- 1999-02-24 JP JP2000534092A patent/JP2002505129A/en not_active Ceased
- 1999-02-24 WO PCT/US1999/004016 patent/WO1999044473A1/en not_active Application Discontinuation
- 1999-02-24 EP EP99909588A patent/EP1059865A4/en not_active Withdrawn
- 1999-02-24 AU AU28760/99A patent/AU2876099A/en not_active Abandoned
- 1999-11-19 US US09/443,522 patent/US6099076A/en not_active Expired - Lifetime
Non-Patent Citations (2)
Title |
---|
No further relevant documents disclosed * |
See also references of WO9944473A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6062649A (en) | 2000-05-16 |
US6099076A (en) | 2000-08-08 |
JP2002505129A (en) | 2002-02-19 |
AU2876099A (en) | 1999-09-20 |
WO1999044473A1 (en) | 1999-09-10 |
BR9908425A (en) | 2000-10-31 |
EP1059865A4 (en) | 2002-07-31 |
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